Abstract Investigations of the turbulence-flame interaction are conducted for ethanol spray combustion with dynamic flame surface wrinkling (DFSW) models in the context of the Artificially Thickened Flame (ATF) approach. DFSW modeling strategies derived for single-phase flows are extended to improve the characterization of the mixture stratification encountered in dilute spray flames. The two-phase flow is described following an Eulerian–Lagrangian approach within the Large Eddy Simulation (LES) framework under consideration of two-way coupling between both gaseous and liquid phases. In particular, combustion reactions are captured by means of the Flamelet Generated Manifold (FGM) method. An evaporation model accounting for the inter-phase non-equilibrium is applied to address droplet’s heat and mass transfer. Main aspects of the suggested DFSW modeling strategy are systematically analyzed. The obtained results demonstrate fair improvements not only in the estimation of the flame structure, but also in the prediction of the spray properties in comparison to a reference model and the available experimental data. This outcome reveals the strong link between turbulence, flame and dispersed phase, as well as the necessity of a suitable computation of each one of these phenomena.

中文翻译：

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使用动态起皱模型结合列表化学研究湍流和乙醇喷雾燃烧之间的相互作用

摘要 在人工增稠火焰 (ATF) 方法的背景下，使用动态火焰表面起皱 (DFSW) 模型对乙醇喷雾燃烧的湍流-火焰相互作用进行了研究。为单相流导出的 DFSW 建模策略得到扩展，以改进稀喷雾火焰中遇到的混合物分层的表征。在考虑到气相和液相之间的双向耦合的情况下，在大涡模拟 (LES) 框架内遵循欧拉-拉格朗日方法描述两相流。特别是，燃烧反应是通过 Flamelet Generated Manifold (FGM) 方法捕获的。应用考虑相间非平衡的蒸发模型来解决液滴的传热和传质问题。系统地分析了建议的 DFSW 建模策略的主要方面。与参考模型和可用的实验数据相比，获得的结果表明，不仅在火焰结构的估计方面，而且在喷雾特性的预测方面都有相当大的改进。这一结果揭示了湍流、火焰和分散相之间的密切联系，以及对这些现象进行适当计算的必要性。